Water leaving reflectance retrievals from MODIS, VIIRS, and Landsat8 data acquired over coastal waters
In early 2000s, with funding support from the NASA SIMBIOS Project, we modified the ocean version of the hyperspectral atmospheric correction algorithm, and developed a MODIS version of multi-channel algorithm for remote sensing of water leaving reflectances over turbid coastal waters from a combination of MODIS land and ocean channels. A SWIR spectrum-matching technique using MODIS channels centered at 1.24, 1.64, and 2.13 micron was used to estimate aerosol models and optical depths. Later on, we developed a VIIRS version of coastal water atmospheric correction algorithm. The VIIRS channels centered at 1.24, 1.61, and 2.25 micron with proper modeling of atmospheric CO2 and CH4 absorption effects and a SWIR spectrum-matching technique were used for atmospheric corrections. More recently, we developed a Landsat8 version of atmospheric correction algorithm with proper consideration of different atmospheric gaseous absorption effects within the broader Landsat8 bands. We will present examples of retrieved water leaving reflectances over coastal waters from MODIS, VIIRS, and Landsat8 images.